GIANT WHELKS, OR PEAR CONCHS, AND EGG RIBBON 



1 Left-handed \Vhelk, Fiilgur perversa. 



2 Egg Ribbon of F.canaliculatus. Several embryos develop in each capsule. 



3 Oijerculum of Fidgur perversa. 



4 Channeled Whelk, Fulgitr canaliculaius. 



